Răspuns:
2/7:3/5=2/7*5/3=10/21
3 1/3:1 1/9=10/3:10/9=10/3*9/10=3
65/8:4 1/16=65/8:65/16=65/8*16/65=2
1: 3 1/7=1:22/7=1*7/22=7/22
Explicație pas cu pas: